Finnan Haddie or Findon Haddock is haddocks which have been headed, gutted and split down the backbone. Finnan haddie are then immersed in brine without any dyes added. The fish are then threaded on spears, a protein gloss allowed to develop and then smoked.
Dowell, P., Bailey, A. (1980) The Book of Ingredients, Dorling Kindersley. ISBN 0718119150.